I picked some up for my mash tun cooler conversion... They are at the Ace hardware just up the street. I can get some if anyone is in need.
they are stainless, 13/16 inside diameter opening and 1 3/4 outside diameter..
I have two here at the house and can get more next time I am up there. (which is often in the POS house I decided to purchase)
When in darkness... when in doubt... run in circles... scream and shout!